M 79
A paper on the Post-mortem findings in two hundred cases of Tuberculosis amongst Chinese infants, by the Government Bacteriologist, was sent for publication with the consent of the Honourable Director of Medical and Sanitary Services,
A review of the water supplies of Hong Kong by the Government Bacteriologist, was published in the Transactions of the Royal Society of Tropical Medicine and Hygiene in April 1930.
A paper was read by the Assistant Government Bacteriologist on "Pellagra in relation to the food supply" at the Conference of the Far Eastern Medical Association at Bangkok, in December 1930.
The Assistant Government Bacteriologist is at present conducting an investigation into the congenital heart conditions found in Chinese infants at the Victoria Mortuary.
The question of Calf Lymph dilution was worked out during the year on Buffalo Calves. The lymph prepared in the Institute was found to be highly efficient in the following dilutions 1 in 5 with glycerine and normal saline (ordinary strength issued) and also in further dilutions with normal saline of 1 in 10, 1 in 25, up to 1 in 50. Unfortunately it was not possible to carry out further tests on newly born Chinese infants.
A comparison of the Precipitation test for Syphilis used in the Institute, with the Wassermann and Kahn tests was started, but had to be abandoned as regards the Kahn test, owing to pressure of routine work. It is hoped to carry out this investigation later, when the new officer for Venereal Diseases takes up his duties.
## PREPARATION OF CALF LYMPH
The supply of Buffalo calves was much improved this year. The number of calves vaccinated during the year was 218, an increase of 101 over last year.
The average yield per calf, of the finished product, glycerinated lymph, was about 90 c.c. per calf.
The quantity of lymph issued during the year was 10,886.8 c.c. made up as follows:
Quantity of lymph issued free 8,940.8 c.c. Quantity of lymph issued and paid for 1,946.0 c.c.The value of the free issues was $18,867.40.